Rainbow Electronics DS21458 - Manual (Page 90)

DS21455/DS21458 Quad T1/E1/J1 Transceivers
90 of 270
Register Name:
FOSCR1
Register Description: Frames Out Of Sync Count Register 1
Register Address: 46h
Bit
# 7 6 5 4 3 2 1 0
Name FOS15 FOS14 FOS13 FOS12 FOS11 FOS10 FOS9 FOS8
Default
0 0 0 0 0 0 0 0
Bits 0 to 7/Frames Out of Sync Counter Bits 8 to 15 (FOS8 to FOS15). FOS15 is the MSB of the 16-bit frames out of sync
count.
Register Name:
FOSCR2
Register Description: Frames Out Of Sync Count Register 2
Register Address: 47h
Bit
# 7 6 5 4 3 2 1 0
Name FOS7 FOS6 FOS5 FOS4 FOS3 FOS2 FOS1 FOS0
Default
0 0 0 0 0 0 0 0
Bits 0 to 7/Frames Out of Sync Counter Bits 0 to 7 (FOS0 to FOS7). FOS0 is the LSB of the 16-bit frames out of sync
count.
15.4 E-Bit Counter Register (EBCR)
This counter is only available in the E1 mode. EBCR1 (EBCR1) is the most significant word and EBCR2
is the least significant word of a 16-bit counter that records far end block errors (FEBE), as reported in
the first bit of frames 13 and 15 on E1 lines running with CRC-4 multiframe. These count registers will
increment once each time the received E-bit is set to zero. Since the maximum E-bit count in a one-
second period is 1000, this counter cannot saturate. The counter is disabled during loss of sync at either
the FAS or CRC-4 level; it will continue to count if loss of multiframe sync occurs at the CAS level.
Register Name:
EBCR1
Register Description: E-Bit Count Register 1
Register Address: 48h
Bit
# 7 6 5 4 3 2 1 0
Name EB15 EB14 EB13 EB12 EB11 EB10 EB9 EB8
Default
0 0 0 0 0 0 0 0
Bits 0 to 7/E-Bit Counter Bits 8 to 15 (EB8 to EB15). EB15 is the MSB of the 16-bit E-bit count.
Register Name:
EBCR2
Register Description: E-Bit Count Register 2
Register Address: 49h
Bit
# 7 6 5 4 3 2 1 0
Name EB7 EB6 EB5 EB4 EB3 EB2 EB1 EB0
Default
0 0 0 0 0 0 0 0
Bits 0 to 7/E-Bit Counter Bits 0 to 7 (EB0 to EB7). EB0 is the LSB of the 16-bit E-bit count.